In a defective crystal of Fe which shows bcc arrangements, some of the unit cells have following arragement. Apart from these are no other defects. Identify the option which is correct.

Options

A. Effective number of atoms in the complete crystal structure will be 1 instead of 2.
B. Density of defective crystal will lie in between half the original density to original density.
C. The crystal will now have structure similar to simple cubic.
D. Co-ordination number of atoms will become 6.